Pressure-gage.



G. w.- KELLOGG. PRESSURE GAGE.

' Patented Sept. 10, 1912.

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UNITED srn rns PATENT OFFICE.

GEORGE KELLOGG, OF ROCHESTER, NEW YORK, ASSIGNOR TO KELLOGG MANUFAC- A TUBING COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK. I

PRESSURE- GAGE.

Specification of Letters Patent. Patented Sept. 10, 1912;

Application filed November .6, 1909. Serial No. 526,510.

' State of New York, have invented certain new and useful Improvements in Pressure- Gages; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of the specification, and to the reference.- numerals marked thereon.

.My present invention relates to pressure gages or registerin devices and it has for 1ts object to provi e an instrument of this character which is adapted particularly to be used in conjunction with receptacles containing air or other fluid under pressure applied by means of a. pump, said device being primarily intended for use in conjunction with the inflated tires of motor vehicles or automobiles, the parts thereof being so arranged that it maybe quicly attached to the usual valve stem of the tire.

To these and other ends the invention consists in certain improvements and con ma tions of parts all as will be more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings: Figure 1 is a view showing in elevation a pressure gage constructed in accordance with my invention, and used in conjunction with apneumatic tire, the latter being shown in cross section. Fig. 2 is a vertical sectional View showing the internal construction of the device.

Similar reference numerals in the several figures indicate similar parts.

A pressure gage constructed in accordance with my invention is adapted particularly to be used during the operation of inflating parts made in compact form and so de signed that there is little or no liability of their becoming deranged, yet permitting the device to be easily applied to or removed from the valve'stem of the tire without the use of tools.

In illustrating the pressure gage embodylng my present invention, I have illustrated a form of pneumatic tire indicated by 1- provided with the inner tube 2 from which leads the valve stem 3 having its outer end projecting through the felly d of thewheel, to which it is attached by the locking nut 5. The valve stems of-pneumatic tires are provided throughout-their length with threads indicated by 6 and at their outer ends are provided with a neck of reduced diameter, as indicated by 7, which are provided with external threads 8 to receive the usual valve cap or closure (not shown), and internal threads 9 in which the locking collar 10 of the valve mechanism is secured. The valve stems are provided with a central perforation 11 which is enlarged at its outer end to form the chamber 12 in which the valve proper is located. The latter may be of the usual or any preferred construction, but as the well known bchraeder valve is the one universally used, I have illustrated this type which comprises the perforated head 13, the inner end of which forms a seat upon which the resilient packing 14 of the plunger 15 is normally held by the extensible spring 16. The plunger 15 is mounted upon the rod 17 guided at its lower end in the cage 18 and having the upper end or extension 19 which projects outwardly through the head 13 and nut 10, its extremityltl lying in such position that it may be depressed to move the plunger 15 into the position shown in Fig. 2 for the purpose of opening the valve either to facilitate inflating the tire or to allow the escapeof fluid therefrom.

The pressure gage indicated by 20 may be provided with any'suitable form of mechanisln which is adapted to be operated by meeting it to the pressure gage. The member 23 is provided with a central chamber formed by the laterally extending portions 26 and 27 which form aconvenient handle for rotating the member 23 during the operation of applying the gage to a valve stem and it also accommodates the valve parts mounted in the shell-28 which are provided to prevent the escape of the air or 'other fluid when connection has been established between thegage and the valve stem, as

shown in Fig. 2. The lower end of the member 23 is cup-shape, as indicated at 29 which is provided with an interior recess 30, as shown, withinwhich is centrally located a stud or pin 31 adapted to project into the neck or reduced portion of the valve stem and to engage the end 19* of the valvereleasing rod and automatically open said valve when the gage is. applied to the valve stem.

The preferred form of connection between the member 23 and the valve stem consists in providing a nut 40 which is adapted to engage the screw threads 6 on the lar e portion of the stem 3 and arranging wit in the recess a sleeve 32 which is adapted to similarly engage the exterior of the neck or reduced portion of the valve stem.

'In arranging these parts I prefer to form the sleeve 32 of rubber, the central aperture therein being of such size that as the member 23 is drawn downwardly by the nut 40, said sleeve will be expanded and slip over the threads of the neck 7 and form an air tight joint by engagement therewith. This arrangement I find to be advantageous in practice on account of the difference in the lead or pitch of the threads employed upon the large and small portions of the valve stem, and further, it obviates the necessity of providing other packing to secure an air tight joint. The sleeve 32 is provided with a base portion or flange 33 overlyin the rim of the cup 29 with which it is he d in engagement by the flange on the nut 40, which latter is secured to member 23 by the threaded flange 3%. Between the nut 40 and the fiange'ot the sleeve is arranged a washer 35. Leading from the recess 30 is an aperture 36 communicating with the chamber containing the valve 28 and from said chamber the passage 37 leads to those devices employed for operating the indicating finger 22 oi' the The valve shell 28 is provided with. the aperture 38 through which air or other fluid escapes into the surrounding chamber when the pump connection is established therein as shown in Fig. 1. y

The simple and compact arrangement of the parts of the device adapts it particularly for the purpose intended. In the cmbodi" ment of the invention shown and described herein the attachment of the game may be quickly made and the reading 0? the gage obtained immediately for it is merely necessary for the operator to rotate the member 23 a sufiicient number of turns to cause the threads 6 acting on the nut 40 to draw the sleeve 32 downwardly onto the neck 7 of the valve and move the pin or valve operating projection 31 into engagement with the valve releasing pin 19, thus automatically operating the latter and opening communication from the tire, or other device containing fluid under pressure, to the gage.

By mounting the gage on the member 23 and in alinement therewith the means for engaging it with a valve stem may be arranged at the other extremity of said member, as the whole device may be made of such dimensions as to permit it to be easily rotated between the spokes of a wheel.

.I'claim as my invention:

1. The combination with the valve stem of 5 a pneumatic tire, of atubular member, a pressure indicating device, a device mounted on the tubular member adapted to cotiperate with the valve stem of'the tire, a transversely arranged chamber extending on 0pposite sides of the tubularmember and arranged between the pressure indicating device and the last mentioned device, said chamber being provided with a valve controlled infiating connection, and the tubular member having movement longitudinally of the valve stem whereby to cause said last mentioned device to engage and open the valve in the tire.

2. The combination with the valve stem of a pneumatic tire, of a vertically disposed tubular member having a transversely arranged chamber extending on opposite sides thereof, a valve controlled inflating connection at one end of said chamber, a pressure indicating device arranged on the tubular member above the transverse chamber, a device mountcd on the tubular member below the transverse chamber and adapted to coopcratc with a valve located in said valve stem, the tubular member having movement longi tudinally of the valve stem whereby to cause said device to engage and'opcn the valve in the valve stem.

3. The combination with the valve stem of a pneumatic tire, having a reduced threaded end portion, of a tubular member having a valve controlled inflating conncction, a pressure indicating device arranged on the tubular member above the inflating connection, a device mounted on the tubular member below the inflating connection and adapted to cooperate with the valve located in said valve stem, a collar attached to the end of the tubular member and having lln'cudcd ongagement with said vnlvo stem, at bushing secured between the collar and the end of the tubular member and having threaded engagement with the reduced end of the valve stem whereby said tulular member is 15.30

movable longitudinally of the valve stem to cause said device to engage and openthe valve. in the valve stem.

i. The combination with the valve stem of a pneumatic tire having a reduced threaded end portion, of a tubular memberhaving a transversely arranged chamber, a valve con trolled inflating connection atone end of said chainben a pressure indicating device arranged on the tubular member above the chamber, a device mounted on the tubular member below the chamber and adapted to cotipeiate With a valve located in the val e stein, a collar-secured to the end of the invalve stem whereby the tubular member. is, "26

movable longitudinally of the valve stem to cause said device to engage and open the valve inthe valve stem.

GEORGE W. nniltoee.

Witnesses: I

Gr. WILLARD RICH, R ssnLL B. GRIFFITH. 

